package com.tutu.common.util;

import java.security.MessageDigest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class MD5 {
	
	protected final static Logger logger = LoggerFactory.getLogger(MD5.class);
	
	 public static String toMD5(String s) {
        char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
                'a', 'b', 'c', 'd', 'e', 'f' };
        try {
            byte[] strTemp = s.getBytes();
            MessageDigest mdTemp = MessageDigest.getInstance("MD5");
            mdTemp.update(strTemp);
            byte[] md = mdTemp.digest();
            int j = md.length;
            char str[] = new char[j * 2];
            int k = 0;
            for (int i = 0; i < j; i++) {
                byte byte0 = md[i];
                str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                str[k++] = hexDigits[byte0 & 0xf];
            }
            return new String(str);
        } catch (Exception e) {
        	logger.warn("MD5加密[{}]失败",s);
            return null;
        }
    }
	 
	 public static void main(String[] args) {
		System.out.println(MD5.toMD5("admin_gmsp")); 
	}
}
